I had earlier the same problems, but solved them. I see that going through exactly the same path as me.
You have to do it like this:
1. Forward FXP to RT and only there do the conversion.
2. I set empirically by means of measuring the speed and chose this value. It depends on the sensor.
3. If you have measured the speed, now you control the output voltage of a power supply. I used to use the old low voltage power supply controllable, and he zwielokratniał them (in 9263, I lived cards). Anyway, you need to have the card outputs AO.
4. I don't known
Also:
1. You must click right mouse button in project on Build Specifications>>Real-Time Application
2. https://forums.ni.com/t5/LabVIEW/crio-standalone/td-p/2337256
